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CAT1640 Datasheet

Supervisory Circuits with I2C Serial 64K CMOS EEPROM

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CAT1640 pdf
CAT1640w,wwC.DaAtaSThee1t4U6.co4m1
Supervisory Circuits with I2C Serial 64K
ALOGEN FR
CMOS EEPROM
LEA D F REETM
FEATURES
s Precision power supply voltage monitor
— 5V, 3.3V and 3V systems
- +5.0V (+/- 5%, +/- 10%)
- +3.3V (+/- 5%, +/- 10%)
- +3.0V (+/- 10%)
s Active low reset, CAT1640
s Active high reset, CAT1641
s Valid reset guaranteed at VCC=1V
s 400kHz I2C bus
s 3.0V to 5.5V operation
s Low power CMOS technology
s 64-Byte page write buffer
s 1,000,000 Program/Erase cycles
s 100 year data retention
s 8-pin DIP, SOIC, TSSOP and TDFN packages
s Industrial temperature range
DESCRIPTION
The CAT1640 and CAT1641 are complete memory and
supervisory solutions for microcontroller-based systems.
A 64kbit serial EEPROM memory and a system power
supervisor with brown-out protection are integrated
together in low power CMOS technology. Memory
interface is via a 400kHz I2C bus.
The CAT1640 provides a precision VCC sense circuit
and drives an open drain output, RESET low whenever
VCC falls below the reset threshold voltage.
The CAT1641 provides a precision VCC sense circuit
that drives an open drain output, RESET high whenever
VCC falls below the reset threshold voltage.
The power supply monitor and reset circuit protect
memory and system controllers during power up/down
and against brownout conditions. Five reset threshold
voltages support 5V, 3.3V and 3V systems. If power
supply voltages are out of tolerance reset signals become
active, preventing the system microcontroller, ASIC or
peripherals from operating. Reset signals become inactive
typically 200 ms after the supply voltage exceeds the reset
threshold level. With both active high and low reset options,
interface to microcontrollers and other ICs is simple. In
addition, the RESET (CAT1640) pin can be used as an
input for push-button manual reset capability.
The CAT1640/41 memory features a 64-byte page. In
addition, hardware data protection is provided by a VCC
sense circuit that prevents writes to memory whenever VCC
falls below the reset threshold or until VCC reaches the reset
threshold during power up.
Available packages include an 8-pin DIP, SOIC, TSSOP
and 4.9 x 3mm TDFN.
PIN CONFIGURATION
PDIP (L) SOIC (W)
A0 1
A1 2
A2 3
VSS 4
CAT1640
8 VCC
7 RESET
6 SCL
5 SDA
A0 1
A1 2
A2 3
VSS 4
TSSOP (Y)
CAT1640
8 VCC
7 RESET
6 SCL
5 SDA
TDFN PACKAGE: 4.9MM X 3MM
(ZD2)
A0 1
A1 2
A2 3
VSS 4
CAT1640
8 VCC
7 RESET
6 SCL
5 SDA
A0 1
A1 2
A2 3
VSS 4
CAT1641
8 VCC
7 RESET
6 SCL
5 SDA
A0 1
A1 2
A2 3
VSS 4
CAT1641
8 VCC
7 RESET
6 SCL
5 SDA
A0 1
A1 2
A2 3
VSS 4
CAT1641
8 VCC
7 RESET
6 SCL
5 SDA
© 2009 SCILLC. All rights reserved.
Characteristics subject to change without notice.
1
Doc. No. MD-3012, Rev. D


  ON Semiconductor Electronic Components Datasheet  

CAT1640 Datasheet

Supervisory Circuits with I2C Serial 64K CMOS EEPROM

No Preview Available !

CAT1640 pdf
CAT1640, CAT1641
BLOCK DIAGRAM CAT1640, CAT1641
EXTERNAL LOAD
VCC
VSS
DOUT
ACK
WORD ADDRESS
BUFFERS
SENSE AMPS
SHIFT REGISTERS
COLUMN
DECODERS
SDA
START/STOP
LOGIC
CONTROL
LOGIC
XDEC
64kbit
EEPROM
www.DataSheet4U.com
Threshold Voltage Options
Part Dash Minimum Maximum
Number Threshold Threshold
-45 4.50 4.75
-42 4.25 4.50
-30 3.00 3.15
-28 2.85 3.00
-25 2.55 2.70
OPERATING TEMPERATURE RANGE
Industrial
-40˚C to 85˚C
RESET Controller
Precision
Vcc Monitor
DATA IN STORAGE
HIGH VOLTAGE/
TIMING CONTROL
STATE COUNTERS
SLAVE
ADDRESS
COMPARATORS
SCL
A0
A1
A2
RESET (CAT1640)
RESET (CAT1641)
PIN FUNCTIONS
Pin Name
RESET
VSS
SDA
SCL
RESET
VCC
Function
Active Low Reset Input/Output (CAT1640)
Ground
Serial Data/Address
Clock Input
Active High Reset Output (CAT1641)
Power Supply
PIN DESCRIPTION
RESET/RESET: RESET OUTPUTS
These are open-drain pins and RESET can also be used
as a manual reset trigger input. By forcing a reset condition
on the pin the device will initiate and maintain a reset
condition. The RESET pin must be connected through a
pull-down resistor and the RESET pin must be connected
through a pull-up resistor.
SDA: SERIAL DATA ADDRESS
The bidirectional serial data/address pin is used to trans-
fer all data into and out of the device. The SDA pin is an
open drain output and can be wire-ORed with other open
drain or open collector outputs.
SCL: SERIAL CLOCK
Serial clock input.
A0, A1, A2: DEVICE ADDRESS INPUTS
When hardwired, up to eight CAT1640/41 devices may
be addressed on a single bus system (refer to Device
Addressing). When the pins are left unconnected, the
default values are zeros.
Doc. No. MD-3012, Rev. D
2
© 2009 SCILLC. All rights reserved.
Characteristics subject to change without notice.


Part Number CAT1640
Description Supervisory Circuits with I2C Serial 64K CMOS EEPROM
Maker ON Semiconductor
Total Page 18 Pages
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